Water in low-mass star-forming regions with Herschel: HIFI spectroscopy of NGC 1333

L. E. Kristensen; R. Visser; E. F. van Dishoeck; U. A. Yildiz; S. D. Doty; G. J. Herczeg; F.-C. Liu; B. Parise; J. K. Jorgensen; T. A. van Kempen; C. Brinch; S. F. Wampfler; S. Bruderer; A. O. Benz; M. R. Hogerheijde; E. Deul; R. Bachiller; A. Baudry; M. Benedettini; E. A. Bergin; P. Bjerkeli; G.A. Blake; S. Bontemps; J. Braine; P. Caselli; J. Cernicharo; C. Codella; F. Daniel; Th. de Graauw; A. M. di Giorgio; C. Dominik; P. Encrenaz; M. Fich; A. Fuente; T. Giannini; J. R. Goicoechea; F. Helmich; F. Herpin; T. Jacq; D. Johnstone; M. J. Kaufman; B. Larsson; D. Lis; R. Liseau; M. Marseille; C. McCoey; G. Melnick; D. Neufeld; B. Nisini; M. Olberg; J. C. Pearson; R. Plume; C. Risacher; J. Santiago-Garcia; P. Saraceno; R. Shipman; M. Tafalla; A. G. G. M. Tielens; F. van der Tak; F. Wyrowski; D. Beintema; A. de Jonge; P. Dieleman; V. Ossenkopf; P. Roelfsema; J. Stutzki; N. Whyborn

doi:10.1051/0004-6361/201015100

Water in low-mass star-forming regions with Herschel: HIFI spectroscopy of NGC 1333

L. E. Kristensen^*, R. Visser, E. F. van Dishoeck, U. A. Yildiz, S. D. Doty, G. J. Herczeg, F.-C. Liu, B. Parise, J. K. Jorgensen, T. A. van Kempen, C. Brinch, S. F. Wampfler, S. Bruderer, A. O. Benz, M. R. Hogerheijde, E. Deul, R. Bachiller, A. Baudry, M. Benedettini, E. A. BerginP. Bjerkeli, G.A. Blake, S. Bontemps, J. Braine, P. Caselli, J. Cernicharo, C. Codella, F. Daniel, Th. de Graauw , A. M. di Giorgio, C. Dominik, P. Encrenaz, M. Fich, A. Fuente, T. Giannini, J. R. Goicoechea, F. Helmich, F. Herpin, T. Jacq, D. Johnstone, M. J. Kaufman, B. Larsson, D. Lis, R. Liseau, M. Marseille, C. McCoey, G. Melnick, D. Neufeld, B. Nisini, M. Olberg, J. C. Pearson, R. Plume, C. Risacher, J. Santiago-Garcia, P. Saraceno, R. Shipman, M. Tafalla, A. G. G. M. Tielens, F. van der Tak, F. Wyrowski, D. Beintema, A. de Jonge, P. Dieleman, V. Ossenkopf, P. Roelfsema, J. Stutzki, N. Whyborn

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Abstract

"Water In Star-forming regions with Herschel" (WISH) is a key programme dedicated to studying the role of water and related species during the star-formation process and constraining the physical and chemical properties of young stellar objects. The Heterodyne Instrument for the Far-Infrared (HIFI) on the Herschel Space Observatory observed three deeply embedded protostars in the low-mass star-forming region NGC 1333 in several (H2O)-O-16, (H2O)-O-18, and CO transitions. Line profiles are resolved for five (H2O)-O-16 transitions in each source, revealing them to be surprisingly complex. The line profiles are decomposed into broad (>20 km s(-1)), medium-broad (similar to 5-10 km s(-1)), and narrow (20 km s(-1)), indicating that its physical origin is the same as for the broad (H2O)-O-16 component. In one of the sources, IRAS4A, an inverse P Cygni profile is observed, a clear sign of infall in the envelope. From the line profiles alone, it is clear that the bulk of emission arises from shocks, both on small (less than or similar to 1000 AU) and large scales along the outflow cavity walls (similar to 10 000 AU). The H2O line profiles are compared to CO line profiles to constrain the H2O abundance as a function of velocity within these shocked regions. The H2O/CO abundance ratios are measured to be in the range of similar to 0.1-1, corresponding to H2O abundances of similar to 10(-5)-10(-4) with respect to H-2. Approximately 5-10% of the gas is hot enough for all oxygen to be driven into water in warm post-shock gas, mostly at high velocities.

Original language	English
Article number	30
Pages (from-to)	L30
Number of pages	6
Journal	Astronomy & Astrophysics
Volume	521
DOIs	https://doi.org/10.1051/0004-6361/201015100
Publication status	Published - Oct-2010

Keywords

astrochemistry
stars: formation
ISM: molecules
ISM: jets and outflows
ISM: individual objects: NGC 1333
PROTOSTELLAR ENVELOPES
PHYSICAL STRUCTURE
NGC-1333 IRAS-4
SUBMILLIMETER
PROTOSTARS
EMISSION
OUTFLOW
ABUNDANCE
VAPOR
DISK

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Kristensen, L. E., Visser, R., van Dishoeck, E. F., Yildiz, U. A., Doty, S. D., Herczeg, G. J., Liu, F.-C., Parise, B., Jorgensen, J. K., van Kempen, T. A., Brinch, C., Wampfler, S. F., Bruderer, S., Benz, A. O., Hogerheijde, M. R., Deul, E., Bachiller, R., Baudry, A., Benedettini, M., ... Whyborn, N. (2010). Water in low-mass star-forming regions with Herschel: HIFI spectroscopy of NGC 1333. Astronomy & Astrophysics, 521, L30. Article 30. https://doi.org/10.1051/0004-6361/201015100

@article{63090bc8b0d5434f9b6056afb9bbed7a,

title = "Water in low-mass star-forming regions with Herschel: HIFI spectroscopy of NGC 1333",

abstract = "{"}Water In Star-forming regions with Herschel{"} (WISH) is a key programme dedicated to studying the role of water and related species during the star-formation process and constraining the physical and chemical properties of young stellar objects. The Heterodyne Instrument for the Far-Infrared (HIFI) on the Herschel Space Observatory observed three deeply embedded protostars in the low-mass star-forming region NGC 1333 in several (H2O)-O-16, (H2O)-O-18, and CO transitions. Line profiles are resolved for five (H2O)-O-16 transitions in each source, revealing them to be surprisingly complex. The line profiles are decomposed into broad (>20 km s(-1)), medium-broad (similar to 5-10 km s(-1)), and narrow (20 km s(-1)), indicating that its physical origin is the same as for the broad (H2O)-O-16 component. In one of the sources, IRAS4A, an inverse P Cygni profile is observed, a clear sign of infall in the envelope. From the line profiles alone, it is clear that the bulk of emission arises from shocks, both on small (less than or similar to 1000 AU) and large scales along the outflow cavity walls (similar to 10 000 AU). The H2O line profiles are compared to CO line profiles to constrain the H2O abundance as a function of velocity within these shocked regions. The H2O/CO abundance ratios are measured to be in the range of similar to 0.1-1, corresponding to H2O abundances of similar to 10(-5)-10(-4) with respect to H-2. Approximately 5-10% of the gas is hot enough for all oxygen to be driven into water in warm post-shock gas, mostly at high velocities.",

keywords = "astrochemistry, stars: formation, ISM: molecules, ISM: jets and outflows, ISM: individual objects: NGC 1333, PROTOSTELLAR ENVELOPES, PHYSICAL STRUCTURE, NGC-1333 IRAS-4, SUBMILLIMETER, PROTOSTARS, EMISSION, OUTFLOW, ABUNDANCE, VAPOR, DISK",

author = "Kristensen, {L. E.} and R. Visser and {van Dishoeck}, {E. F.} and Yildiz, {U. A.} and Doty, {S. D.} and Herczeg, {G. J.} and F.-C. Liu and B. Parise and Jorgensen, {J. K.} and {van Kempen}, {T. A.} and C. Brinch and Wampfler, {S. F.} and S. Bruderer and Benz, {A. O.} and Hogerheijde, {M. R.} and E. Deul and R. Bachiller and A. Baudry and M. Benedettini and Bergin, {E. A.} and P. Bjerkeli and G.A. Blake and S. Bontemps and J. Braine and P. Caselli and J. Cernicharo and C. Codella and F. Daniel and {de Graauw}, Th. and {di Giorgio}, {A. M.} and C. Dominik and P. Encrenaz and M. Fich and A. Fuente and T. Giannini and Goicoechea, {J. R.} and F. Helmich and F. Herpin and T. Jacq and D. Johnstone and Kaufman, {M. J.} and B. Larsson and D. Lis and R. Liseau and M. Marseille and C. McCoey and G. Melnick and D. Neufeld and B. Nisini and M. Olberg and Pearson, {J. C.} and R. Plume and C. Risacher and J. Santiago-Garcia and P. Saraceno and R. Shipman and M. Tafalla and Tielens, {A. G. G. M.} and {van der Tak}, F. and F. Wyrowski and D. Beintema and {de Jonge}, A. and P. Dieleman and V. Ossenkopf and P. Roelfsema and J. Stutzki and N. Whyborn",

year = "2010",

month = oct,

doi = "10.1051/0004-6361/201015100",

language = "English",

volume = "521",

pages = "L30",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = " EDP Sciences",

}

Kristensen, LE, Visser, R, van Dishoeck, EF, Yildiz, UA, Doty, SD, Herczeg, GJ, Liu, F-C, Parise, B, Jorgensen, JK, van Kempen, TA, Brinch, C, Wampfler, SF, Bruderer, S, Benz, AO, Hogerheijde, MR, Deul, E, Bachiller, R, Baudry, A, Benedettini, M, Bergin, EA, Bjerkeli, P, Blake, GA, Bontemps, S, Braine, J, Caselli, P, Cernicharo, J, Codella, C, Daniel, F, de Graauw , T, di Giorgio, AM, Dominik, C, Encrenaz, P, Fich, M, Fuente, A, Giannini, T, Goicoechea, JR, Helmich, F, Herpin, F, Jacq, T, Johnstone, D, Kaufman, MJ, Larsson, B, Lis, D, Liseau, R, Marseille, M, McCoey, C, Melnick, G, Neufeld, D, Nisini, B, Olberg, M, Pearson, JC, Plume, R, Risacher, C, Santiago-Garcia, J, Saraceno, P, Shipman, R, Tafalla, M, Tielens, AGGM, van der Tak, F, Wyrowski, F, Beintema, D, de Jonge, A, Dieleman, P, Ossenkopf, V, Roelfsema, P, Stutzki, J & Whyborn, N 2010, 'Water in low-mass star-forming regions with Herschel: HIFI spectroscopy of NGC 1333', Astronomy & Astrophysics, vol. 521, 30, pp. L30. https://doi.org/10.1051/0004-6361/201015100

TY - JOUR

T1 - Water in low-mass star-forming regions with Herschel

T2 - HIFI spectroscopy of NGC 1333

AU - Kristensen, L. E.

AU - Visser, R.

AU - van Dishoeck, E. F.

AU - Yildiz, U. A.

AU - Doty, S. D.

AU - Herczeg, G. J.

AU - Liu, F.-C.

AU - Parise, B.

AU - Jorgensen, J. K.

AU - van Kempen, T. A.

AU - Brinch, C.

AU - Wampfler, S. F.

AU - Bruderer, S.

AU - Benz, A. O.

AU - Hogerheijde, M. R.

AU - Deul, E.

AU - Bachiller, R.

AU - Baudry, A.

AU - Benedettini, M.

AU - Bergin, E. A.

AU - Bjerkeli, P.

AU - Blake, G.A.

AU - Bontemps, S.

AU - Braine, J.

AU - Caselli, P.

AU - Cernicharo, J.

AU - Codella, C.

AU - Daniel, F.

AU - de Graauw , Th.

AU - di Giorgio, A. M.

AU - Dominik, C.

AU - Encrenaz, P.

AU - Fich, M.

AU - Fuente, A.

AU - Giannini, T.

AU - Goicoechea, J. R.

AU - Helmich, F.

AU - Herpin, F.

AU - Jacq, T.

AU - Johnstone, D.

AU - Kaufman, M. J.

AU - Larsson, B.

AU - Lis, D.

AU - Liseau, R.

AU - Marseille, M.

AU - McCoey, C.

AU - Melnick, G.

AU - Neufeld, D.

AU - Nisini, B.

AU - Olberg, M.

AU - Pearson, J. C.

AU - Plume, R.

AU - Risacher, C.

AU - Santiago-Garcia, J.

AU - Saraceno, P.

AU - Shipman, R.

AU - Tafalla, M.

AU - Tielens, A. G. G. M.

AU - van der Tak, F.

AU - Wyrowski, F.

AU - Beintema, D.

AU - de Jonge, A.

AU - Dieleman, P.

AU - Ossenkopf, V.

AU - Roelfsema, P.

AU - Stutzki, J.

AU - Whyborn, N.

PY - 2010/10

Y1 - 2010/10

N2 - "Water In Star-forming regions with Herschel" (WISH) is a key programme dedicated to studying the role of water and related species during the star-formation process and constraining the physical and chemical properties of young stellar objects. The Heterodyne Instrument for the Far-Infrared (HIFI) on the Herschel Space Observatory observed three deeply embedded protostars in the low-mass star-forming region NGC 1333 in several (H2O)-O-16, (H2O)-O-18, and CO transitions. Line profiles are resolved for five (H2O)-O-16 transitions in each source, revealing them to be surprisingly complex. The line profiles are decomposed into broad (>20 km s(-1)), medium-broad (similar to 5-10 km s(-1)), and narrow (20 km s(-1)), indicating that its physical origin is the same as for the broad (H2O)-O-16 component. In one of the sources, IRAS4A, an inverse P Cygni profile is observed, a clear sign of infall in the envelope. From the line profiles alone, it is clear that the bulk of emission arises from shocks, both on small (less than or similar to 1000 AU) and large scales along the outflow cavity walls (similar to 10 000 AU). The H2O line profiles are compared to CO line profiles to constrain the H2O abundance as a function of velocity within these shocked regions. The H2O/CO abundance ratios are measured to be in the range of similar to 0.1-1, corresponding to H2O abundances of similar to 10(-5)-10(-4) with respect to H-2. Approximately 5-10% of the gas is hot enough for all oxygen to be driven into water in warm post-shock gas, mostly at high velocities.

AB - "Water In Star-forming regions with Herschel" (WISH) is a key programme dedicated to studying the role of water and related species during the star-formation process and constraining the physical and chemical properties of young stellar objects. The Heterodyne Instrument for the Far-Infrared (HIFI) on the Herschel Space Observatory observed three deeply embedded protostars in the low-mass star-forming region NGC 1333 in several (H2O)-O-16, (H2O)-O-18, and CO transitions. Line profiles are resolved for five (H2O)-O-16 transitions in each source, revealing them to be surprisingly complex. The line profiles are decomposed into broad (>20 km s(-1)), medium-broad (similar to 5-10 km s(-1)), and narrow (20 km s(-1)), indicating that its physical origin is the same as for the broad (H2O)-O-16 component. In one of the sources, IRAS4A, an inverse P Cygni profile is observed, a clear sign of infall in the envelope. From the line profiles alone, it is clear that the bulk of emission arises from shocks, both on small (less than or similar to 1000 AU) and large scales along the outflow cavity walls (similar to 10 000 AU). The H2O line profiles are compared to CO line profiles to constrain the H2O abundance as a function of velocity within these shocked regions. The H2O/CO abundance ratios are measured to be in the range of similar to 0.1-1, corresponding to H2O abundances of similar to 10(-5)-10(-4) with respect to H-2. Approximately 5-10% of the gas is hot enough for all oxygen to be driven into water in warm post-shock gas, mostly at high velocities.

KW - astrochemistry

KW - stars: formation

KW - ISM: molecules

KW - ISM: jets and outflows

KW - ISM: individual objects: NGC 1333

KW - PROTOSTELLAR ENVELOPES

KW - PHYSICAL STRUCTURE

KW - NGC-1333 IRAS-4

KW - SUBMILLIMETER

KW - PROTOSTARS

KW - EMISSION

KW - OUTFLOW

KW - ABUNDANCE

KW - VAPOR

KW - DISK

U2 - 10.1051/0004-6361/201015100

DO - 10.1051/0004-6361/201015100

M3 - Article

SN - 0004-6361

VL - 521

SP - L30

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

M1 - 30

ER -

Water in low-mass star-forming regions with Herschel: HIFI spectroscopy of NGC 1333

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Keywords

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